While reading through spring issues of the 1965 Sporting News recently, I spotted an ad offering "N.Y. YANKEES / IN FULL COLOR!"
I did not recognize the name of the advertiser, Pan American Photo," but from the description of "8x10 AUTOGRAPHED PHOTOS" and the checklist, I realized that the ad was offering what the hobby knows today, and what I listed in the Standard Catalog of Baseball Cards many years ago, as Requena photos.
In the tradition of Dormand and Bill and Bob color player postcards of the mid-1950s, the Requenas offered exceptionally sharp posed player photos. In fact, many of the Requena Yankees pix were also offered in postcard format.
What was new to me in the ad was that the Requena pictures were also offered in black-and-white versions, as were a number of Yankees and players from other teams. Those b/w issues are not cataloged, probably because if they follow the format of the color photos, they are not marked as to issuer.
I note that two of the cataloged Requena color 8x10s, Ralph Houk and Al Downing, were not listed in the original 1965 TSN ad, though Downing was offered in black-and-white.
After having managed the Yankees to three AL pennants and two World Championships in 1961-63, Houk was serving as General Manager when the Requenas were first issued in 1965, returning as field manager in 1966 (and finishing in last place).